I think I have a HDMI/HDCP handshake issue with my projector. I have had an Optoma EW628 projector hooked up to my desktop PC for about 2 years which has always worked perfectly.
I'm running Windows 10, and the graphics card is an admittedly old Intel HD Graphics 2000. I have an HDMI lead plugged into the HDMI port on the PC with the other end plugged into the projector via an HDMI to DVI convertor, as it does not have an HDMI port.
As I say, this set up has worked fine for around 2 years until this week, when I had Sky Q installed. For those that aren't familiar, Sky Q is a digital TV home network that has a master box connected to a satellite dish, which then uses home Wifi network to stream content to connected mini boxes in other rooms around the home.
I used a HDMI splitter to connect the sky box to the projector as well as the PC, and this seemed to work fine for a short time. I could switch between the two signals without issue by pressing the switch on the splitter.
However, all of a sudden the PC is unable to detect the projector.
Things I have checked:
I have removed the splitter completely and
Connected the projector directly to PC: no signal on projector
Connected the projector directly to Sky box: signal comes through fine
Connected another HD monitor to PC via same HDMI cable: signal comes through fine
Connected another laptop (with Intel HD Graphics 5300 card) via HDMI cable directly to projector: no signal on projector
Connected another laptop (with Intel HD Graphics 5300 card) via same HDMI cable directly to another HD monitor: signal comes through fine
Connected another PS3 via HDMI cable directly to projector: no signal on projector
Connected another PS3 via HDMI cable directly to HD TV: signal comes through fine
So it seems that the projector will now only recognise the signal from the Sky Q mini box and nothing else.
I have tried the usual process of connecting a projector to Windows as described here to no avail.
I have also come across a few posts describing similar issues here, here and here and what I have surmised from those is that connecting the Sky Q mini box has caused some kind of HDMI/HDCP handshake issue that has encrypted the connection and only the sky Q connection can bypass it.
Does that sound feasible? If so, is there a way round it? It seems that the issue is with the projector, so is there a way to do a firmware upgrade? Or get in to the engineer menu and do a factory reset or something?
Or could it be that something is fried in the projector now? and if that means I need to go out and buy a new one, what are the chances of this happening again?
This is completely frustrating as it ran without issue for so long and is still happy to display the Sky Q signal.
--UPDATE--
I have managed to access the service menu by pressing Power, <, <, Menu on the remote control. I saw that there was a "Factory Reset" option which I was hoping would return the firmware to it's original state and begin picking up the signal from the PC.
Unfortunately this has not happened, it still ignores the PC and laptop when both are connected directly via HDMI. VGA connection works fine.
